Po171 Causes

[flhusa1]

ok here is the data from my carchip:

 

View / Vehicle Trouble Log / Record Problem 4

Overview

Time : 10/30/2008 01:24 PM

Vehicle : Unknown #1

CarChip : J-9998-A

Trouble Code : P0171

Description : System Too Lean (Bank 1)

Comments :

Engine Status

Fuel Pressure (Gage) :

Intake Manifold Pressure (Absolute) : 8.6 psi

Engine Coolant Temperature : 152.6 °F

Calculated Load Value : 12.2 %

Engine Speed : 1,481 RPM

Vehicle Speed : 17 MPH

Fuel Trim Status

Short-Term Fuel Trim (Bank 1) : 1.56 %

Short-Term Fuel Trim (Bank 2) : 3.13 %

Long-Term Fuel Trim (Bank 1) : 21.88 %

Long-Term Fuel Trim (Bank 2) : 21.09 %

Fuel System Status

Fuel System 1 Status : Closed loop; using oxygen sensor(s) as feedback for fuel control.

Fuel System 2 Status : Closed loop; using oxygen sensor(s) as feedback for fuel control.

 

it did this 3 different times with the exact same readings. anybody have a clue why it does it at 17mph and 152.6 temp?

 

thanks in adavance

 

tonite i installed new o2 sensors upstream will have to see if that changes anything. truck has 96k